Natural History. 235 



voyage, it had become amalgamated ; but the person who 

 would successfully make the experiment must not forget that 

 if the plate is lost, it is probably because it would readily 

 detach itself, nothing scarcely being so fragile as gold pene- 

 trated by mercury. As to the expense, I shall readily bear it 

 with pleasure. Application may be made to M. Lucas, agent 

 of the Institute, who will immediately give the value to any 

 person willing to take charge of the experiment. — Memoires du 

 Museum., vii. 479. 



